Valve transmitter for short waves



July 9, 1935. PRiNz Z,@@7fi2 VALVE TRANSMITTER FOR SHORT WAVES Filed Jan. 4, 1954 BY gMr M ATTORNEY UNITED STATES PATENT OFFICE VALVE TRANSMITTER ron snoa'r WAVES Dietrich Prinz, Berlin, Germany, assignor to Telefunken Gesellsehaft fiir Drahtlose Telegraphic m. b. H., Berlin, Germany, a corporation of Germany Application January 4, 1934, Serial No. 705,242 In Germany January 9, 1933 3 Claims. (01. 250-36) The invention, relates to circuit arrangements The advantages of this circuit scheme are twofor the generation of short electrical waves and fold; first, in the addition of the power generated is a further development of the scheme known to by several individual tubes, and, secondly, in the the art as the Holborn circuit. Figure 1 shows series connection or both the inductance of the the known type of circuit referred to and Figure 2 clips as well as the capacities of the tubes with 5 shows an embodiment of the present invention. the result that, while the resultant oscillation Referring to Figure l, I and 2 denote two electron circuit has the same wave length, the relationship tubes whose plates are interconnected by a clip 3, between inductance and capacity is far more while the grids thereof are united with each favorable than in a transmitter with but two other by clip 4. The inductances or these clips or valves. 7 10 loops in conjunction with the tube capacities con- 1 claim: stitute the oscillation circuit. The midpoints of 1. In combination, a plurality of pairs of electhe clips are connected by way of the choke coils tron discharge devices each device having a grid 5 and 6 with the plate and the grid voltage source, and anode, the anodes of the tubes of each pair 5 respectively, not herein shown. being connected together through a linear con- Now, according to the present invention four, nection devoid of lumped inductance and lumped six or even a larger even number of tubes are resistance, and the grid of each tube in a pair used in a similar circuit arrangement. Figure 2 being connected to the grid of a tube in an adshows, by way of example, an embodiment comjacent pair through a similar linear connection.

prising six tubes. The tubes are designated by 2. In combination, a plurality of pairs of elecpairs as I, 2, I, 2', I, 2". The plates of tubes I tron discharge devices, each device having a grid and 2 are interconnected by means of a clip 3, and anode, a linear connection devoid of lumped likewise the plates of tubes I, 2 by a clip 3', and resistance and lumped inductance between the the plates of tubes I", 2" by a clip 3". anodes of thedevices comprising each pair, and

Between each pair of grids there is also provided a similar linear connection between the grid of 5 a clip, but quite differently from the arrangement each device in a pair and the grid of another deshown in Figure 1, the clip is not disposed between vice in an adjacent pair, and individual leads exthe grids of two tubes whose plates are intertending from the midpoints of each of said conconnected, but instead between the grids of two nections to sources of potential.

tubes which pertain to different pairs. Thus the 3. In atransmitter arrangement for the genera- 30 grids of the tubes 2 and I are united by the clip 4, tion of short waves, a plurality of pairs of electhe grids of tubes 2 and I" by the clip 4, the tron discharge devices, each device having a grid grids of the tubes 2" and I by'the clip 4". and anode, a linear connection devoid of lumped The midpoints of the plate connecting clips 3, 3, resistance between the anodes of the devices com- 3" are connected by way of choke coils 5,. 5, 5" prising each pair, and a similar linear connection 35 with the plate potential source, and the midpoints between the grid of each device in a pair and the of the grid clips 4, 4', 4" with the grid voltage grid of another device in an adjacent pair, and source. individual leads extending from the midpoints of All of the cathodes, if desired by way of choke each of said connections to sources of potential,

40 coils (not shown in the drawing) are connected and a choke coil in each of said leads. 40

with one another. DIETRICH PRINZ. 

